Location from Undertale / Deltarune by Toby Fox
A volcanic industrial zone where Alphys runs her lab, Mettaton runs his shows, and the conveyor belts never stop moving you toward spectacle.
Hotland is where Undertale shifts from exploration to spectacle. Alphys guides you through via your upgraded phone while Mettaton stages increasingly elaborate attempts on your life — quiz shows, cooking shows, news broadcasts, musicals — all for ratings. The area is a gauntlet of puzzles, performances, and the growing sense that Alphys is not being entirely honest. The True Lab is hidden beneath Alphys's main laboratory — the horror section that the game saves for last. Muffet runs her bake sale on the upper floors. MTT Resort marks the entrance to the CORE.
Reddish-orange terrain rising above flowing lava, with industrial infrastructure — steam vents, conveyor belts, lasers, elevators. The architecture transitions from natural rock to technological precision as you approach the CORE. Everything is hot. Everything moves.